Enclosure not stated · 8 knobs
Four Band EQ
- Category
- EQ / Filter· Tone Control and EQs
- Price
- see vendor
- Tags
- Tone Control and EQs
Schematic
The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.
Parts list 28 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 7 | ||||
| ×12 | 10k | 10k | two series and one feedback per band; read from the schematic by eye | |
| ×8 | 47k | 47k | read from the schematic by eye | |
| ×8 | 4k7 | 4.7k | read from the schematic by eye | |
| ×1 | 100k | 100k | input bias; read from the schematic by eye | |
| ×1 | 100 | 100 | output; read from the schematic by eye | |
| ×2 | 150 | 150 | supply filter; read from the schematic by eye | |
| ×1 | 330 | 330 | LED; read from the schematic by eye | |
| Capacitors 6 | ||||
| ×2 | 0.047uF | 47n | band 1; read from the schematic by eye | |
| ×2 | 0.01uF | 10n | band 2; read from the schematic by eye | |
| ×2 | 0.0039uF | 3.9n | band 3; read from the schematic by eye | |
| ×2 | 0.0022uF | 2.2n | band 4; read from the schematic by eye | |
| ×4 | 100uF | 100u | electrolytic, supply; read from the schematic by eye | |
| ×4 | 0.01uF | 10n | supply bypass; read from the schematic by eye | |
| Diodes 1 | ||||
| ×2 | 1N4001 | 1N4001 | half-wave rectifiers; read from the schematic by eye | |
| ICs 4 | ||||
| IC1 | 5532 | 5532 | read from the schematic by eye | |
| IC2 | 5532 | 5532 | read from the schematic by eye | |
| IC3 | 5532 | 5532 | read from the schematic by eye | |
| IC4 | 5532 | 5532 | read from the schematic by eye | |
| Potentiometers 8 | ||||
| Cut/Boost 1 | 10k | 10k | Potentiometer | band 1; read from the schematic by eye |
| Cut/Boost 2 | 10k | 10k | Potentiometer | band 2; read from the schematic by eye |
| Cut/Boost 3 | 10k | 10k | Potentiometer | band 3; read from the schematic by eye |
| Cut/Boost 4 | 10k | 10k | Potentiometer | band 4; read from the schematic by eye |
| Freq 1 | 100k | 100k | Potentiometer | dual-gang, band 1 (35-680Hz); read from the schematic by eye |
| Freq 2 | 100k | 100k | Potentiometer | dual-gang, band 2 (150-3kHz); read from the schematic by eye |
| Freq 3 | 100k | 100k | Potentiometer | dual-gang, band 3 (450-8.5kHz); read from the schematic by eye |
| Freq 4 | 100k | 100k | Potentiometer | dual-gang, band 4 (750-15kHz); read from the schematic by eye |
| Switches 1 | ||||
| ×1 | SPST | SPST | power switch on 12VAC secondary; read from the schematic by eye | |
| LEDs 1 | ||||
| ×1 | LED | LED | power indicator; read from the schematic by eye | |